PHP 密码长度至少为8,且必须包含大小写字母/数字/符号任意三者组合

**密码长度至少为8,且必须包含大小写字母/数字/符号任意三者组合

 public function rexCheckPassword()
    {
        $pwd = '12345678aaA';
        // 8-20 位，字母、数字、字符
        //密码必须包含大小写字母/数字/符号任意两者组合
        $regStr = "/^(?![a-zA-Z]+$)(?![A-Z0-9]+$)(?![A-Z\\W_]+$)(?![a-z0-9]+$)(?![a-z\\W_]+$)(?![0-9\\W_]+$)[a-zA-Z0-9\\W_]{8,20}$/";
//        $regStr = "/^(?![0-9]+$)(?![a-z]+$)(?![A-Z]+$)(?!([^(0-9a-zA-Z)]|[\(\)])+$)([^(0-9a-zA-Z)]|[\(\)]|[a-z]|[A-Z]|[0-9]){8,}$/";
        if(preg_match($regStr, $pwd)){
            dump(1);
        }else{
            dump(0);
        }
    }